prioress

A nun in charge of a priory or ranking next below the abbess of an abbey.

A female prior, having charge of a religious house; a woman who is the coadjutor of and next in rank to an abbess.

A lady superior of a priory of nuns, and next in dignity to an abbess.

a nun in charge of a priory; an abbess or mother superior

the superior of a group of nuns